# “Measurement entries with different gestations detected” on the Weight tab when patient details look correct?

**Category:** [Growth Charts](https://forum.rcpch.tech/c/rcpch-digital-growth-charts/6)
**Created:** 2025-12-30 10:28 UTC
**Views:** 9
**Replies:** 1
**URL:** https://forum.rcpch.tech/t/measurement-entries-with-different-gestations-detected-on-the-weight-tab-when-patient-details-look-correct/648

---

## Post #1 by @Malach1te

Hi everyone,
We have had several instances reported now that when you open the Weight tab on a patient’s growth chart, you will get this error below,
Measurement entries with different gestations detected. Measurements from only one patient at one time are supported.

The patient details (DOB, sex, gestational age) all look correct and consistent. Other tabs load fine, it’s just the Weight tab that shows this.
Has anyone seen this before?

What usually causes this error?
Could it be something in older measurements or data from different encounters?
Is there a specific field I should check to make sure the gestation is the same everywhere?

Thanks for any advice!

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## Post #2 by @eatyourpeas

Thank you for raising this issue - this is so far the first time we have come across this: could you clarify the work flow? What should happen is the webform/EHR takes the sex, gestation, measurement method, observation value (and reference) of a child and posts that to the API. This should return a JSON object, a list of Measurement class objects relating to that patient for that measurement method (height, weight, ofc, bmi). Each measurement object in the list will contain the information received as well as the calculation results:
```
[
            {
                birth_data: {
                    ...
                },
                bone_age: {
                    ...
                },
                child_observation_value: {
                    ...
                },
                events_data: {
                    ...
                },
                measurement_calculated_values: {
                    ...
                },
                measurement_dates: {
                    ...
                },
                plottable_data: {
                    ...
                }
            },
]
```
Each object should have the same date of birth, gestation, measurement_method and sex. If there is a discrepancy here the chart will throw an error for the whole list.

Is this your workflow? Is there any way that the calculated measurement objects returned from the API are being processed in someway before being passed to the charts? 

If you have maybe an example of what you are posting I can try it out my end and see if i can reproduce what you are seeing.

---


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**Original content:** https://forum.rcpch.tech/t/measurement-entries-with-different-gestations-detected-on-the-weight-tab-when-patient-details-look-correct/648